Matplotlib:如何在两个不同的轴上显示条形图和线条的图例？

import matplotlib.pyplot as plt
import numpy as np

x = np.array([1, 2, 3, 4, 5])
y1 = np.array([10, 20, 30, 40, 50])
y2 = np.array([50, 40, 30, 20, 10])

fig, ax1 = plt.subplots()
ax2 = ax1.twinx()

ax1.bar(x, y1, color='blue', alpha=0.5, label='Bar Chart')
ax2.plot(x, y2, color='red', label='Line Chart')

ax1.legend(loc='upper left')
ax2.legend(loc='upper right')

ax1.set_xlabel('X-axis')
ax1.set_ylabel('Y1-axis')
ax2.set_ylabel('Y2-axis')
plt.title('Bar Chart and Line Chart')

plt.show()